2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.model.repo.api;
10 import com.google.common.annotations.Beta;
11 import com.google.common.collect.ImmutableList;
12 import com.google.common.util.concurrent.FluentFuture;
13 import com.google.common.util.concurrent.ListenableFuture;
14 import org.eclipse.jdt.annotation.NonNull;
15 import org.opendaylight.yangtools.util.concurrent.FluentFutures;
16 import org.opendaylight.yangtools.yang.model.api.source.SourceRepresentation;
19 * A filter of schema sources. This is used to restrict which sources representation instances are allowed
20 * to participate in construction of a schema context. This allows, for example, to create an non-shared island,
21 * or require the sources to be certified before use.
24 public interface SchemaSourceFilter {
26 * A {@link SchemaSourceFilter} which accepts any schema source it is presented with.
28 @NonNull SchemaSourceFilter ALWAYS_ACCEPT = new SchemaSourceFilter() {
29 private final ImmutableList<Class<? extends SourceRepresentation>> representations =
30 ImmutableList.of(SourceRepresentation.class);
33 public ImmutableList<Class<? extends SourceRepresentation>> supportedRepresentations() {
34 return representations;
38 public FluentFuture<Boolean> apply(final SourceRepresentation schemaSource) {
39 return FluentFutures.immediateTrueFluentFuture();
44 * Get the representations this filter supports. A schema source is translated
45 * into one of these representations before it is presented for filtering.
47 * @return Set of supported representations.
49 Iterable<Class<? extends SourceRepresentation>> supportedRepresentations();
52 * Check if a particular schema source is acceptable to the filter. The process
53 * of checking may be asynchronous, but at some point it needs to produce an
54 * affirmative or negative answer before the schema context construction can
57 * @param schemaSource Schema source to be filtered
58 * @return Promise of a filtering decision. The result should be {@link Boolean#TRUE}
59 * if the source is acceptable.
61 ListenableFuture<Boolean> apply(SourceRepresentation schemaSource);